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Environment-friendly treatment method based on printing and dyeing wastewater

A technology for the treatment of printing and dyeing wastewater and environmental protection, which is applied in the textile industry wastewater treatment, water/sewage treatment, neutralization water/sewage treatment, etc. Removal of problems such as poor effect, to achieve the effect of less investment, energy saving and consumption reduction, and improved effect

Active Publication Date: 2019-12-27
JIEYANG EXPERIMENTAL ZONE & NEW DYEING & FINISHING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the above methods, the removal effect of toxic substances and chroma in wastewater is poor, and the printing and dyeing water obtained after treatment is often difficult to meet the discharge standards, and the input cost of raw materials is very high.

Method used

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  • Environment-friendly treatment method based on printing and dyeing wastewater
  • Environment-friendly treatment method based on printing and dyeing wastewater
  • Environment-friendly treatment method based on printing and dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method based on the environmental protection treatment of printing and dyeing wastewater includes the following steps: (1) After the printing and dyeing wastewater is heat-exchanged through a heat exchange device, it is passed into a regulating tank; the temperature of the printing and dyeing wastewater after heat exchange is 30°C; Add an acid-base regulator to the adjustment tank to adjust the pH to 8.5, and the COD to 300mg / L; specifically, the acid-base regulator includes the following components by weight: 25 parts of citric acid, 2 parts of sodium hydroxide, and 1 of hydrochloric acid solution; (2) The waste water is introduced into the reaction tank, and alkaline resin is added to the reaction tank. The reaction tank is a concrete tank, and the waste water is discharged after stirring and reacting for 1 hour; specifically, the alkaline resin is a strong alkaline anion exchange resin. The COD of the wastewater discharged after the reaction treatment is less than 50...

Embodiment 2

[0040] A method based on the environmental protection treatment of printing and dyeing wastewater, including the following steps: (1) After the printing and dyeing wastewater is heat-exchanged through a heat exchange device, it is passed into a regulating tank; the temperature of the printing and dyeing wastewater after heat exchange is 35°C; Add an acid-base regulator to the adjustment tank to adjust the pH to 9.5, and the COD to 500mg / L; specifically, the acid-base regulator includes the following components in parts by weight: 33 parts of citric acid, 4 parts of sodium hydroxide, and 3 parts of hydrochloric acid solution; (2) The waste water is introduced into the reaction tank, and alkaline resin is added to the reaction tank. The reaction tank is a concrete tank, and the waste water is discharged after stirring and reacting for 2 hours; specifically, the alkaline resin is a strong alkaline anion exchange resin, which is passed through The COD of the wastewater discharged af...

Embodiment 3

[0042] A method based on the environmental protection treatment of printing and dyeing wastewater includes the following steps: (1) After the printing and dyeing wastewater is heat-exchanged through a heat exchange device, it is passed into a regulating tank; the temperature of the printing and dyeing wastewater after heat exchange is 30°C; Add an acid-base regulator to the adjustment tank to adjust the pH to 8.5 and COD to 300mg / L; specifically, the acid-base regulator includes the following components by weight: 25 parts of citric acid, 4 parts of sodium hydroxide, and 1 of hydrochloric acid solution; (2) The waste water is passed into the reaction tank, and alkaline resin is added to the reaction tank. The reaction tank is a concrete tank, and the waste water is discharged after stirring and reacting for 1.5 hours; specifically, the alkaline resin is a strong alkaline anion exchange resin, The COD of the wastewater discharged after the reaction treatment is less than 50 mg / L;...

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Abstract

The invention discloses an environment-friendly treatment method based on printing and dyeing wastewater. The method comprises the following steps: (1) carrying out heat exchange treatment on the printing and dyeing wastewater through heat exchange equipment, feeding the printing and dyeing wastewater into an adjusting tank, and adjusting the pH value to be 8-8.5 and the COD (Chemical Oxygen Demand) to be 300-500 mg / L; (2) adding phosphate substances into the wastewater, and carrying out mixed reaction for 4-6 hours; and (3) introducing the wastewater obtained in the step (3) into a hydrolysisacidification pool, carrying out a reaction for 2-3 h, introducing water into a neutralization pool, and carrying out a neutralization reaction. According to the invention, through the cooperation ofpH value adjustment and acidification hydrolysis, flora in the printing and dyeing wastewater is effectively removed, the COD content in the wastewater is effectively reduced, and a good water treatment effect is achieved.

Description

Technical field [0001] The invention belongs to the technical field of printing and dyeing wastewater treatment, and particularly relates to a method based on the environmental protection treatment of printing and dyeing wastewater. Background technique [0002] In the process of fabric printing and dyeing, a large amount of printing and dyeing wastewater will be produced, and this printing and dyeing wastewater needs to be treated before it can be discharged. Traditional treatment methods usually reduce the COD of wastewater through processes such as adsorption, filtration, coagulation, and biochemistry. However, in the above method, the removal of toxic substances and chromaticity in the wastewater is poor, the printing and dyeing water obtained after treatment is often difficult to meet the discharge standard, and the input cost of raw materials is high. Summary of the invention [0003] In order to overcome the shortcomings of the prior art, the present invention provides an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/30
CPCC02F1/66C02F2103/30C02F1/42C02F2001/422C02F2303/04C02F2201/007C02F2201/002
Inventor 陈沛男
Owner JIEYANG EXPERIMENTAL ZONE & NEW DYEING & FINISHING CO LTD
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